Thanks, For anyone interested - here is prancing horse's answer for your convenience: ---------------------------- Firstly you should or rather will have a completely separate account for your CFD trading. You will or should get a complete summary of your transactions for that financial year. Your costs are fees, losses, int paid and this subtracted from all your income, ie profit, divs, int rec. On your net profit you will be taxed at if it was income. What I do is, the last week of Feb I take 40% of that profit and add it to my provisional tax payment. ----------------------------- I think that is a good idea: Last week of February, withdraw 40% of profit and either pay as provisional or store in a safe place i.e. away from temptation :-)